Tandem hitch for ground-treating units.



W. R. PETERSON.

TANDEM HHCH FOR GROUND TREATING UNITS.

, APPLICATION FILED MAY2I, 19!]. 1,322,046. Patented Nov. 18, 1919.

2 SHEETSSHEET I.

y 5 gfmgm W. R. PETERSON.

TANDEM HITCH FOR GROUND TREATING UNITS.

APPLICATION men mnzx. i911,

1,322,046. Patented Nov. 18, 1919.

2 SHEETS--SHEET 2 a m T $5 Znvenfir.

7 l 21 mrlfil ezardmu ill llTED STATES TENT @FFTQE.

WALTER. It. PETERSON, OF GHmAGO, ILLINOIS, ASSIGNGR, BY {AfiSIGIillllIENTfi 10 INTEENATIONAL HABVES'IER COMFANY, A CORPORATION 03? NEW JERSEY.

TANDEM HITCH FOR GROUND-TREATING UNITS. I

Specification of Letters Eatent.

Patented Nov. 18, 1919.

Application filed May 21, 1917. Serial No. 170,052.

To all whom it may concern: I

Be it known that I, WALTER R. Pnrnnson,

a citizen of the lnited States, residing at for ground treating units, and more particnlarly to tandem hitches for disk harrows.

Two essential requisites for proper operation of double disk barrows are that there shall be flexibility so that the harrow may be easily turned under-good and adverse conditions, and that there shall be proper trailing of the 1' ar unit so that ridges of ground made by the front harrow unit will be leveled by the trailing harrow unit. Most of the double disk harrows in use today have one or the other of these requisites, but they do not have both of these requisites, or do not have the same to a desired degree.

It is, therefore, one object of my invention tk) connect llVO units in cl, manner SllCll that there will be flexibility between the various parts and also a proper trailing" relationship to accomplish the desired results.

A further object of my invention is to provide a simple, durable and efiicient harrow which is adapted to meet all the re quirements for successful commercial operation.

These and other objects are accomplished by providing front and rear units and a novel telescopically mounted connection betwoenfsaid units.

The invention is illustrated on the ac companying sheets of drawings, in which Figure l is a plan view of a doubledisk harrow en'ibodying my invention;

Fig.2 is a plan view of the same, showing in dotted lines relative positions which. the froxfiharrow nnit and rear harrow unit mayassun'u n 1 ,l.lllllg a sharp corner;

Fig. 3 is a partial side elevation with the disk gang's straightened up and showing particularly one of the draft connections between the front and rear units;

Fig". 4 is a view taken in the plane of line. -401 Fig. 1 and showing in side elevation the rear portionofone of the draft connecting members between the front and rear units, with the cooperating parts of the'rear -unit shown in section; and,

Fig. 5 1s a fragmentary front elevation,

parts being in section, taken in the plane of line 55 of Fig. 1 and showing the antitilting means for the rear unit and draft connection leading from the rear unit toward the front.

The various novel features of my invention will be apparent from the followimg description and drawings and will be particularly pointed out in the appended claims. My invention is shown in connection with a double disk harrow having a front unit 10 and rear unit 11 which are flexibly con nected in a. manner to .be considered in detail hereinafter. The front umt includes a frame 11, to which are pivotally connected nects the frame 12 with transverse bar 16 at the other side of the front'unit. Connected to the inner ends of the disk gangs are links 19,,which are connected to operating levers 20, whereby the angularity of the front disk gangs may be varied with respect to the line of draft.

The rear unit includes a frame having a rear transverse frame member 21, side frame members -22 and 23, and a front transverseframe member ll connected to said side frame members and having forwardly extending wedge-shaped port-ions and 26, the functions of which will be hereinafter described. There are two disk gangs 2? and 28 connected to the rear frame on vertical pivots, one of said disk gangs 27 being piv.- orally mounted in the left rear corner of the rear frame and the other disk gang 28 being mounted in theright rear corner of the rear frame. The angularity-oil. the rear @0111: and rear transverse 'h'znne 11ers: and The usual links 33 connect; the T0111 .hsk gangs to the rear frame.

By longexnerience it has been-Pound, that here mnst be :1 great deal of fiexibfliiy eetween the front and rem units 015 11 double disk hnfmw in order that the burrow may properly turned Withent aiming the rem unit and c 'amping and twistine" the 'f H1118 net of shape. 1

To mike double disk hEHlOWS flexible 1L0 the desired clegme I have connected the front and rear units in novel 1111111111 21? 113 draft bars 01" links 34% and ene ef H e links 3 being vertically pivoted t the Year end of the link member 17' of the {rent 11211 row unit, and the other dl'ais; link being" O!) "vertim 11 pivetally connected to the ether link 1'5 the frontharrow unit. These P921111 01' 11111-151 23 i and are pa and, to each other 211111 extend pm'el iel to the 1101111111 fine 01'' (111111 and are on 0 1 1081116 sides; e'f the iengb indfnml cen'ier 01 median line of the Inn-10W.

The fem end 01? the draft 111.11 34- is 111 111117011 er i'eileeeopicafly mounted "with respect [0- nnit and passes through :1 Keep 111 311111431. I56 connected the rem. Emmememj L 51111111111413 the 1:11:11 end 01 the 0H1e1: (111." 1 member 35 is 511161111113 01" tale seepienfiy emlneetefl t0 fihe year fn'une 11mm- 2mm pueses threugh 51 100p nwmbey 3T 0 em'n'meced to the 1' e113 Frame n'lember 9,1. 7 draft links 39': 11116. 35 are provided with en n'lemberes 38 and respectively, on "the n sides ihereof, "which 110171112111 engn 'e me Extent apexes of the wefige-amqnw l 11" '1 i 1hr 11'1e11'1 bers 25 and 26, respectively, fer 111;; the real 1111111 to travel in guided 11: new forwardly Wifll the front unit mm 1 110. front unit is i'noved felwzudly, H1 the stop members 35 and 3 re A 1 a engage the apexes of these (111 105110 i (1 Mt connection 111011111011; 21116 to $11.1 y, when 1; 1e hJ'PJOW is; "111-11 1- friendly in L Agni line :11" 1411 11- so. The Pen test e1 1, 111111151; 0e the double L1 A; 11:111011' ekinp; 1112111 1101.: He disk narrows, in u'n be real unit is; glued :H'eunfh which e not only nndesh'ab ie 'f'rmn the 1:1 ndpeint 0f wm'lq but FitTfliiflf-S the fl'en'ae (1-2 the nme hine very serimlsly and. nmn times; pernnnently I the, 'h'zune. "M11311 1113 7.111312 (101111001011 a great degree of flexibil' i'tv is ehiainc-(L fin, nntking :1 short turn to A Lille 1 t ne left 11%110 11'1 111F195. H10 rear unit will be drawn entirely {5U elm-ft link 11 1111 W111 teieaeepe m by the view; new? dle 0131 31: (111111111111: 3-2 Fez 'uqflly H11'ougfh 100p nunnber M3 on tne rem frame. 1971 making; Shel-i turn m the leit. as in '2, the step 111111111101. 3?? W111 to the left 1110113, the inside 11(11'51011 of the "ii'fidf shaped member i251.

1 endea- 1101'111211 011111 111115 eendithe ham-1 1111 will heldmn Rae-411211 211 111 0 1' Number Ii?) 1 31i be 111011111 the left. Likewiwe. the other 1110 3555 1111 1111151 1111!; 2% will 13111119111 move 01 the 11"1'11'11'1111111111511 111111 111" the We 15111111111; nmnher' 11111 We 11221111 1 in i1.

1 1111:1101 to the right. 1 event, .1

1,110 0:! Med. :1

the nutwnben 1H1: H1211, 11L e. 21 maneuthe M5211? erzflfe 1 11111 11', m shown 1101-1111111 0' 34- engegee H10 1141.1 ceni; the 10011 36 10 a hmTOW 111115 110001111 .1 11011 the 11:11'10' z'mneidern hf 1 e 59 on right (1111 rem: "ii-$11110 1114 1115101 1111 1111111. 1111 1 110541. 1150 #511111; a rein-1111111 nnn'emem to 1111 111111 001111111? he (1116 1'ez11 (7371: M11111 other i114ns1t1'e1m it. will be. '11P (lmfl 111e111i1en-2 e1 mp lnember 383 an E preven' haunt. (1f the frfzunen. links or membe sm'ypieafly nwnnied 1 111111115 deracrihed. 1, in (JJKWUZNAL 1n the? desirable nm'" iii.

1x1 E11 M11111 (1 11.1en11s er H11 11m 111'111'1111151. T1 (1121M eennevtion gunwvvemtmi $211111 sawn'vi in K11111 1 9: (111111 11 Waverly 131cm 1 (revved 11:1 :31 1; 1121117 line 111% U 1 11 Mai,

' ticularly shown and described, and it is my intention to cover all such modifications draft connection to of said rear unit.

following claims.

which do not involve a deIJarture from the scope of my invention as hat I claim as neW is- 1. In combination, frond and rear groups of earth working units, and frame members connecting said front and rear groups including telescopically related elements.

2. In combination, front and rear groups of earth working units, and frame members connecting saidfront and rear groups including telescopically related elements, one

of which is, hingedly to one of said groups.

3. In combination, front and rear groups of earth working units, and frame members connecting said'front and rear groups including telescopically related elements, one of which is flexibly connected at one end to one of said groups. 1

,1. A double harrow, comprising front and connected at one end 'rear units, and independent draft connections between said units which telescope with the rear unit.

5. A double harrow, comprising front and rear units, and independent draft connections between said units which are pivotally. connected to one of the units and telescope with the other.

6. v A double harrow, comprising front and rear units, and independent draft connections between said units which are pivot-ally connected to the front unit and telescope with the rear unit.

7. In combination, front and rear units including earth working tools, draft connections including draft members hingedly,

mounted on one unit and having .a forward and backward movement relative to said other unit, and means for limiting said for-. ward and backward movement.

8. In combination, front and rear units including earth working tools, draft connec-- tions including draft members hingedly mounted on the front unit and having a forward and backward movement relative to said rear unit, and means for limiting said forward and backward movement.

9. In a double harrow, front and rear units, a draft connection between said units which telescopes with one of the units, and means on the rear unit associated with the prevent forward tilting 10. In a doubl'e'harrow. front and rear units, a connection therebetweenflexibly set forth in the V-shaped means on opposite sides of the me dian line of the harrow and associated with the connection for guiding the rear unit to level the ground ridged up by the first unit.

13. In a double harrow, front and rear units, a connection therebetween having a relatively sliding movement with respect to the rear unit, and means whereby said connection assumes a given position when both units are moving in a straight line.

14. In a double harrow, front and rear units, and separate flexibly mounted draft members located upon opposite sides of the longitudinal center of-the harrow immediately connecting said units and having a sliding movement with respect to one of said units.

15. In a double harrow, front and rear units, and independently movable draft members located upon opposite sides of the longitudinal center of the harrow immediately connecting said units and having a sliding movement with respect to one of said units.

16. In a ground treating implement, front and rear frames, one of said frames having draft guiding means, ground treating tools carried by said front and rear frames. and hinged independent draft connections between said front and rear frames cooperating with said draft guiding means.

units, the rear unit having draft guiding portions, and connecting means between said front and rear unit-s, said connecting means being adapted to lie in one position with respect to said draft guiding means when the barrow is being drawn in a straight line and in another position when the harrow is taking a curved path.

19. In a double barrow, front and rear units, the rear unit having forwardly converging draft guiding portions, and a connection between said front and rear units having parts which cooperate with said draft guiding portions in a manner to share the draft when going in a straight line and and'rear frames, ground treating tools carried thereby, and relatively movable draft members on opposite sides of the-median line of draft connected to said frames. each of said draft members having a sliding movement with respect to one of said frames and engaging one of said frames at a plurality of points to prevent a relative lateral swaying of said frames, said draft members centering themselves upon a straight line pull exerted upon one of the frames.

In an implement, front and rear units having frames, connecting members hingedly mounted on one unit and slidably mounted on the frame of the other.

36. In an in'iplement, front and rear units, connecting means hingedly mounted on one unit and slidably mounted on the other, and means associated with the connecting means for normally maintaining the rear unit in a predetermined position.

37. In a double harrow, front and rear units, independent and guidably mounted draft connections therebetween, and means associated with said connections to limit relative movement of said units.

38. In a ground treating implement, front and rear frames, ground treating tools guidably mounted draft connections between the frames and stop means associated with said connections and one of said frames to limit relative movement of said frames.

39. An attaclin'ient for a ground treating implement, a frame, ground treating units carried thereby and independent draft members adapted tobe pivotally connected to the implement and slidably connected to said frame.

40. An attachment for a ground treating implement, a frame. ground treatingunits carried thereby and independent draft members adapted to be pivotally connected to the implement and telescopically mounted upon said frame.

l1. An attachment for a ground treating implement, a frame, ground treating units carried thereby and independent draft members adapted to be pivotally connected to the implement and telescopically mounted upon said frame, and means for centeringsaiel frame. with respect to the draft members.

l2. In an attachment for an implement, a group of ground treating tools and frame members connected to said group including telesco incally related elements.

43. In a ground treating implement, front and rear units, independent rigid draft members connecting said units, and means causing both draft members to operate during the forward movei'nent of the ha-rroW, and but one to operate during the turning movement.

In a grouml treating implement, front and rear units, independent rigid draft members connecting said units, and means causing both draft members to operate during the forward movement of the barrow, and that member alone opposite the side toward which the implement is turned to operate as a draft member during the turning movement.

45. In a ground treating implement, front and rear units, independent rigid draft members connecting said units, and means causing said members to cooperate to maintain the units in proper relative position when the implement.is traveling straight ahead and to act independently when the imp ement is being turned.

46. In combination front and rear frames, earth working tools carried thereby, and independently slidable draft elements imme' diately connecting said frames.

In testimony whereof I affix my signature.

' WALTER R. PETERSON. 

